Brake shoe



April 23, 1935. [:1 LA 1,998,676

BRAKE SHOE Original Filed Feb. 20, 19:53

IN V EN TOR.

LUQ ER E. LA BRIE ATTORNEY Patented Apr. 23, 1935 UNITED STATES BRAKE SHOE Ludger E. La Brie, South Bend, Ind., assignor to Bendix Aviation Corporation, South Bend, Ind., a corporation of Delaware Original application February 20, 1933, Serial No. 657,693. Divided and this applicationOctober 19, 1933, Serial No. 694,213

8 Claims.

This invention relates to brake shoes, and is illustrated as embodied in a shoe for an internal expanding brake for an automobile.

An object of the invention is to form the shoe web in an inexpensive and simple manner toprovide for engagement with thrust'devices at one or both ends, and for movable engagement [preferably with a rocking movement) with a brake anchor between its ends.

To this end, an intermediate portion of the shoe web has an opening for the brake anchor, with one side of the opening extending substantially radially of the shoe and forming an anchor-engaging surface. Preferably this surface is slightly rounded, i. e. it is curved on a relatively long radius, to give a slight rocking movement on the anchor to permit the shoe to adjust its position to the curvature of the drum.

Preferably at least one of the ends of the shoe web is formed for engagement with a thrust device, such as an applying member or a floating connection to another shoe. This is provided for, in the illustrated shoe, by relatively wide notches in the ends of the shoe web, which I prefer to form with the base of each notch in the form of a curve extending crosswise of the web, so that the thrust members may adjust themselves readily to different positions of the shoe.

The above and otherobjects and features of the invention will be apparent from the following description of the illustrative embodiment shown in the accompanying drawing, in which:

The figure is a side elevation of the shoe.

The illustrated shoe comprises a rim it), in the form of a cylindrical section or steel stamping, to which is riveted or otherwise secured the usual brake lining I2, and to which is attached by welding or the like a web 14.

The web M has openings it for the attachment of springs, and an opening 18 for a suitable steady rest. It also has an opening 20 for the fulcruming thereon, when it is the primary shoe, of an operating lever (not shown) which has a connection extending through an arcuate slot 22 and which connection operates a thrust member engaging the secondary shoe. The illustrated shoe is merely turned over when used as a secondary shoe, at which time the openings 2|] and 22 are not used.

The above-described constructions are for the purpose of adapting the shoe for use in the brake fully described, and claimed, in my application No. 657,693, filed February 20, 1933, of which the present application is a division.

The shoe web has at its ends relatively wide notches 2 5 and 26, the upper notch 24 being intended to receive and be engaged by the abovementioned applying thrust member when the shoe is used as a secondary shoe, and the lower notch 25 being intended to receive and be engaged by an adjustable link or connecting thrust member extending from the other shoe.

Preferably the base or bottom of each of the notches 24 and 26 is slightly rounded, i. e. it is curved on a relatively long radius, to form a radial thrust surface 28 which permits a slight rocking motion of the thrust members to adjust themselves to difi'erent positions of the shoes.

Intermediate its ends the shoe web has an opening 39, to receive a brake anchor or post having a flattened side slidably engaged by the lower radial edge 32 of the opening. Preferablythe radial surface 32 is slightly rounded,- i. e. it is curved on a relatively long radius,- so that the shoe is permitted a slight rocking motion on the anchor.

While one illustrative, embodiment has been described in detail, it is not my intention to limit the scope of the invention to that particular embodiment, or otherwise than by the terms of the appended claims.

I claim:

1. A brake shoe having a rim and a web, the

web having at each of its opposite ends a notch to receive a thrust member, with the base of the notch a curve extending crosswise of the Web, and said web having between its ends an opening to receive a brake anchor and. having one side of the opening extending crosswise of the web and curved on a relatively large radius to give an anchor-engaging slightly-curved edge surface.

2. A brake shoe having a rim and a web, the web having at each of its opposite ends a notch to receive a thrust member, with the base of the notch a curve extending crosswise of the web, and said web having between its ends an opening to receive a brake anchor and having one side of the opening extending crosswise of the web andforming an anchor-engaging substantially radial surface.

3. A brake shoe having a rim and a web, the web having at each of its opposite ends a relatively wide notch to receive a thrust member, and said web having between its ends an opening to receive a brake anchor and having one side of the opening extending crosswise of the web and curved on a relatively large radius to give an anchor-engaging slightly-curved edge surface.

4. A brake shoe having a rim and a web, the web having at each of its opposite ends a relatively wide notch to receive a thrust member, and said web having between its ends an opening to receive a brake anchor and having one side of the opening extending crosswise of the Web and forming an anchor-engaging substantially radial surface.

5. A brake shoe formed for engagement with thrust means at its ends and having between its ends an opening for a brake anchor and which has one side forming a substantially radial an chor-engaging surface formed on a slightlyrounded curve.

6. A brake shoe having between its ends an opening for a brake anchor and which has one side forming a substantially radial anchor-em gaging surface formed on a slightly-rounded curve.

'7. A'brake shoe having between its ends an opening for a brake anchor and which has one side forming a substantially radial anchor-engaging surface and having at one end an opening for the pivot of an operating lever and an adjacent slot for a connection actuated by said lever.

8. A brake shoe formed for engagement with thrust means at its ends and having between its ends an opening for a brake anchor and which has one side forming a substantially radial anchoir-engaging surface and also having at one end an opening. for the pivot of an operating lever.

LUDGER E. LA BRIE. 

